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Method for advancing flowering time of japonica hybrid rice sterile lines and method for improving production of hybrid seeds

A technology of flowering time and hybrid rice, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problem of low seed production and other issues

Active Publication Date: 2013-05-22
CHINA NAT RICE RES INST
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that in the process of hybrid japonica rice seed production, the flowering time of the parent of the sterile line is late and the parent of the restorer line is early, and the flowering time does not meet in a day, which leads to the problem of low seed production.

Method used

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Examples

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Effect test

Embodiment 1

[0030] (1) Breeding of CMS hybrid rice with early flowering characteristics in a day

[0031] "ZF-GH2" was used as the donor parent, and the maintainer line "Liao 65B" of the japonica rice CMS line Liao 65A was used as the recipient parent to cross (F1′). In the F2′ generation, dark yellowish-brown glumes appeared 1 / 4 individuals, select individuals with dark yellowish-brown glumes and close to the recipient parents in shape of leaves and direct continuous selection until stable; or backcross with the recipient parents (BC1F1′), the same dark yellow glumes in the BC1F2′ generation Brown will isolate 1 / 4 of the individuals. Because the dark yellow-brown glume is controlled by a recessive single gene, the morphological marker will no longer segregate after selection in the segregation generation. When ZF-GH2 is crossed with the recipient parent, individuals with dark yellow-brown glume can be directly selected from the single-cross F2′, or can be backcrossed 1 to 3 times to se...

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Abstract

The invention relates to the field of production of hybrid seeds of japonica hybrid rice, and particularly relates to a method for advancing flowering time of japonica hybrid rice sterile lines. According to the method, the early flowering time character of rice germplasm ZF-GH2 with the preservation number of CGMCC No.6177 is used for improvement on parents of the japonica hybrid rice sterile lines, and the flowering time of the japonica hybrid rice sterile lines in a day is advanced through the effect of peculiar genes in ZF-GH2. The method can effectively solve the problem that the flowering times are different in the production process of hybrid seeds of japonica hybrid rice in the same day, so that the flowering times of the improved sterile line parents in the same day are synchronous with restore line parents or are more advanced, and thus the fertility rate of glumous flowers in the day is greatly improved in the hybrid seed production process.

Description

[0001] technical field [0002] The invention belongs to the field of plant life sciences, relates to the field of japonica hybrid rice seed production, and specifically provides a method for advancing the flowering time of a sterile line of japonica hybrid rice and a method for improving seed production of japonica hybrid rice. Background technique [0003] The use of rice heterosis in my country has been in indica rice for 40 years, and has made a significant contribution to solving the problem of food self-sufficiency in my country. However, the use of heterosis in japonica rice is far inferior to that of indica rice. One of the important reasons is that the outcrossing habit of japonica rice is not as good as that of indica rice, so that the yield of seed production is not high and the cost of rice production is increased. The outcrossing habit is composed of many aspects, among which the opening time is early and neat in a day, which is extremely favorable for the polli...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 朱旭东王跃星陈红旗倪深
Owner CHINA NAT RICE RES INST
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